<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>行内块中有空隙</title>
    <style>
        div {
            float: left;
            width: 150px;
            height: 200px;
            background-color: pink;
        }
    </style>
</head>

<body>
    <div>1</div>
    <div>2</div>
    <div>3</div>
    <!-- 为什么需要浮动 -->
    <li>多个块级元素纵向排列找标准流</li>
    <li>多个块级元素横向排列找浮动</li>
</body>

</html>